/Engine/Source/Runtime/ImageCore/Public/ImageCoreUtils.h
IsImageImportPossible returns false if the image dimensions are not supported to import if this function returns true, image import might still fail due to further constraints (this constraint is weaker than the one actually required) (see IsImportResolutionValid, which is also still weaker than the final constraint) IsImageImportPossible does not check current Engine config or platform limits, only hard-coded absolute limits
namespace FImageCoreUtils { bool FImageCoreUtils::IsImageImportPossible ( int64 Width, int64 Height ) }